CN104076554B - Reflective LCD device and electronic equipment - Google Patents

Reflective LCD device and electronic equipment Download PDF

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Publication number
CN104076554B
CN104076554B CN201410117682.4A CN201410117682A CN104076554B CN 104076554 B CN104076554 B CN 104076554B CN 201410117682 A CN201410117682 A CN 201410117682A CN 104076554 B CN104076554 B CN 104076554B
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Prior art keywords
light
substrate
liquid crystal
pixel
lcd device
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CN201410117682.4A
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CN104076554A (en
Inventor
福永容子
木村晋
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Japan Display Central Inc
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Japan Display Central Inc
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Priority to CN201710413141.XA priority Critical patent/CN107290892A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133553—Reflecting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133357—Planarisation layers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133616—Front illuminating devices

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal (AREA)
  • Geometry (AREA)
  • Planar Illumination Modules (AREA)

Abstract

A kind of reflective LCD device and electronic equipment for suitably suppressing Moire fringe is provided.The reflective LCD device possesses liquid crystal panel and preceding light unit, and liquid crystal panel has：Reflecting electrode；First substrate, it is provided with reflecting electrode；Transparency electrode, it is relative with reflecting electrode and is set by per multiple unit pixel；Second substrate, it sets transparency electrode；Liquid crystal layer, it is arranged between first substrate and second substrate；And the anisotropic scattering part of sheet, it is laminated on second substrate, and mixed configuration region of low refractive index and the refractive index high-refractive-index regions higher than region of low refractive index, preceding light unit have：Light guide plate, it is laminated on the face of second substrate side of liquid crystal panel, and groove of multiple pitches less than 100 μm is formd on the face relative with liquid crystal panel；And light source, it makes light incident to light guide plate, wherein, the average configuration space of the pitch more than the high-refractive-index regions of anisotropic scattering part of unit pixel.

Description

Reflective LCD device and electronic equipment
Technical field
The present invention relates to reflective LCD device and the electronic equipment with the reflective LCD device.
Background technology
Display is gone back in addition to the transmissive display that the transmitted light formed using the backlight at the picture back side is shown There is the reflected displaying device shown using the reflected light of exterior light.Reflected displaying device has power consumption low, what is become clear Under environment also easily visible picture the characteristics of.
Additionally, in order to exterior light it is few or without place can also use, also having to possess on reflected displaying device makes The preceding light unit (referenced patent document 1,2) that light is injected from the display surface side of image.For example, describing this in patent document 1 The front illumination device of sample, the front illumination device possesses light conductor and is configured in front of illuminated thing and uses, described to lead Body of light has from the incident section of light source incident light and the reflecting part for making the light from the light source be reflected towards illuminated thing.Additionally, Front illumination device possesses the diffusion part being diffused to the reflected light from reflecting part between incident section and reflecting part.
Reflective LCD device configures in the display picture side of liquid crystal display panel, i.e. display surface preceding light unit Side, makes light the past light unit incident to liquid crystal display panel, is reflected by reflecting electrode, even if so that insufficient in exterior light In the case of can also from display surface project light.Further, since can from use exterior light in the case of identical direction inject Light, therefore light can be effectively utilized.
Here, preceding light unit has light source and light guide plate, light guide plate is laminated in the display surface of liquid crystal display panel, make from The light of light source output injects liquid crystal display panel by scattering, reflection etc..In order that the edge that the light source from configuration in side is injected The light for display surface injects liquid crystal display panel, and some light guide plates form concavo-convex in the face parallel with display surface.In recent years, exist Surface forms small concavo-convex, and further average backward liquid crystal display panel reflects to make the light that projects from light source, can be further Improve optical property.But, if using the preceding light unit with the light guide plate that small recess is formd on surface, existed sometimes Moire fringe can be produced on shown image.
Therefore, it is an object of the invention to can suitably suppress Moire fringe, the anti-of high-quality image can be shown Penetrate formula liquid crystal display device and the electronic equipment with the reflective LCD device.
Prior art literature
Patent document
Patent document 1：JP 2004-6128 publications
Patent document 2：JP 2001-345008 publications
The content of the invention
In order to achieve the above object, the present invention is a kind of reflective LCD device and shows with the reflection type liquid crystal The electronic equipment of showing device, reflective LCD device possesses liquid crystal panel and preceding light unit, and the liquid crystal panel has：Instead Radio pole；First substrate, the first substrate is provided with above-mentioned reflecting electrode；Transparency electrode, the transparency electrode is anti-with above-mentioned Radio is extremely relative and is set by per multiple unit pixel；Second substrate, the second substrate is provided with above-mentioned transparency electrode；Liquid crystal Layer, the liquid crystal layer is arranged between above-mentioned first substrate and above-mentioned second substrate；And the anisotropic scattering portion of sheet Part, the anisotropic scattering part is laminated on above-mentioned second substrate, mixed configuration region of low refractive index and refractive index The high-refractive-index regions higher than above-mentioned region of low refractive index, preceding light unit has：Light guide plate, the light guide plate is laminated in State on the face of above-mentioned second substrate side of liquid crystal panel, multiple pitches are formd on the face relative with above-mentioned liquid crystal panel and is less than 100 μm of groove；And light source, the light source makes light inject above-mentioned light guide plate, wherein, the pitch of above-mentioned unit pixel is more than above-mentioned The average configuration space of the high-refractive-index regions of anisotropic scattering part.
In reflective LCD device in said structure and the electronic equipment with the reflective LCD device, The light guide plate that multiple pitches are less than 100 μm of groove is formd by using on the face relative with liquid crystal panel, such that it is able to enter One step accurately adjusts the distribution of the light that the past light unit is injected towards liquid crystal display panel.So, more light can be made Projected to target direction, can made further average towards the distribution of the light of the direction from whole display surface.Additionally, by stacking Anisotropic scattering part, makes the pitch of unit pixel average more than the high-refractive-index regions of above-mentioned anisotropic scattering part Configuration space, even if so that using foring multiple pitches on the face relative with liquid crystal panel less than 100 μm of groove In the case of light guide plate, it is also possible to suppress Moire fringe.Therefore high-quality image can be shown.
According to the present invention, even if forming the structure with preceding light unit, use small recessed with being formd on surface In the case of the preceding light unit of the light guide plate in portion, it is also possible to suppress Moire fringe.
Brief description of the drawings
Fig. 1 is the sectional view of the schematic configuration for showing reflective LCD device of the invention.
Fig. 2 is the schematic configuration reflecting type liquid crystal display panel of the invention with the solid shown in the state of partly cut-away Figure.
Fig. 3 A are the circuit diagrams for representing basic pixel circuit.
The schematic diagram of pixel when Fig. 3 B are colored displays.
The schematic diagram of pixel when Fig. 3 C are monochromatic displays.
Fig. 4 is the top view of the pixel portion of reflective LCD device.
Fig. 5 is the sectional view of anisotropic scattering part.
Fig. 6 is the schematic diagram of the function of illustrating anisotropic scattering part.
Fig. 7 is the schematic diagram of the function of illustrating anisotropic scattering part.
Fig. 8 is a schematic diagram for example of the optical design for representing reflective LCD device.
Fig. 9 is the top view of the schematic configuration for representing preceding light unit.
Figure 10 is the amplification plan view of the schematic configuration for representing light guide plate.
Figure 11 is the line A-A sectional view of Figure 10.
Figure 12 is the explanatory diagram of the function of the preceding light unit of explanation.
Figure 13 A are to represent the stereoscopic figure for applying digital camera of the invention.
Figure 13 B are to represent the stereoscopic figure for applying digital camera of the invention.
Figure 14 is to represent the stereoscopic figure for applying video camera of the invention.
Figure 15 is to represent the stereoscopic figure for applying subnotebook PC of the invention.
Figure 16 A are the front views for representing the open mode for applying mobile phone of the invention.
Figure 16 B are to represent the side view for applying mobile phone of the invention.
Figure 16 C are the front views for representing the closed mode for applying mobile phone of the invention.
Figure 16 D are to represent the left view for applying mobile phone of the invention.
Figure 16 E are to represent the right view for applying mobile phone of the invention.
Figure 16 F are to represent the top view for applying mobile phone of the invention.
Figure 16 G are to represent the upward view for applying mobile phone of the invention.
Figure 17 is to represent the front view for applying other mobile electronic devices of the invention.
Specific embodiment
Just it is used to implement mode of the invention (being depicted below as " implementation method ") in the following order following with accompanying drawing It is specifically described.
1. reflective LCD device of the invention is applied
1-1. supports the reflective LCD device of colored display
1-2. basic image element circuit
1-3. pixels and sub-pixel
The electrode structure of 1-4. pixel portions
The type of drive of 1-5. liquid crystal display panels
1-6. anisotropic scattering parts
Light unit before 1-7.
The function of 1-8. reflective LCD devices
2. electronic equipment
3. composition of the invention
＜ 1. applies reflected displaying device ＞ of the invention
Technology of the invention can apply to the display of flat (plane formula).Can be shown as panel display Used liquid crystal display (LCD：Liquid crystal display) panel display device.
If these panel displays are classified according to display mode, transmission-type and reflective is segmented into.The present invention Technology can apply to reflective display.Reflective display is suitable as electronic equipment and is wherein suitable as at family Outer frequency of use portable electronic equipment high, the i.e. mobile information apparatus or portable such as mobile electronic device such as digital camera The display part of the mobile communication equipments such as formula telephone set is used.
Can be the display device, or branch for supporting monochromatic display using reflective LCD device of the invention Hold the display device of colored display.In the case of supporting colored display, as a display picture of the unit for forming colour element Element includes multiple sub-pixels (Sub-pixel).More specifically, in the display device for supporting colored display, a display picture Element for example includes display red (Red：R sub-pixel), display green (Rreen：G sub-pixel), display blueness (Blue：B) Sub-pixel these three sub-pixels.
But a pixel is not limited to be combined with the trichromatic sub-pixel of RGB.For example, except the trichromatic son of RGB Pixel, it is also possible to add the sub-pixel of a kind of color or multiple color as a display pixel.More specifically, for example in order to carry High brightness, it is also possible to addition display white (White：W sub-pixel) as a display pixel, or in order to expand color reproduction Scope and add display complementary colours at least one sub-pixel as a display pixel.Additionally, being shown with a sub-pixel In the case of gray scale, sub-pixel can also be comprising many sub- sub-pixels.Here, in the present embodiment, by display pixel, sub- picture The pixel of the middle least units such as plain, sub- sub-pixel is used as unit pixel.That is, by changeable display and non-display minimum electrode Scope is used as unit pixel.
[1-1. supports the reflective LCD device of colored display]
The following Reflective liquid crystal displays as application reflective LCD device of the invention to support colour to show It is described with reference to the accompanying drawings as a example by device.
Fig. 1 is the sectional view of the schematic configuration for showing reflective LCD device of the invention.As shown in figure 1, reflection Formula liquid crystal display device 1 has reflecting type liquid crystal display panel 2 and preceding light unit 4.Preceding light unit 4 configures aobvious in reflection type liquid crystal Show the surface side of the display image of panel 2.Additionally, in the present embodiment, direction that the light source 40 of preceding light unit 4 is arranged, lead The long side direction of the side that the light from light source 40 of tabula rasa 44 is injected injects the light projected from light source 40 as X-direction Direction will be laminated the direction of reflecting type liquid crystal display panel 2 and preceding light unit 4 as Z-direction as Y-direction.
As depicted in figs. 1 and 2, have as main composed component using reflecting type liquid crystal display panel of the invention 2 First panel portion (TFT substrate) 10, second panel portion (CF substrates) 20 and liquid crystal layer 30.Reflecting type liquid crystal display panel 2 The face side in second panel portion 20 turns into display surface side.First panel portion 10 and second panel portion 20 are by with specified gap ground phase To configuration.Also, liquid crystal material is encapsulated in the space in first panel portion 10 and second panel portion 20, liquid crystal layer is consequently formed 30。
First panel portion 10 sets gradually clear glass etc. as the of baseplate material from the opposition side of liquid crystal layer 30 One substrate 14 and be formed in first substrate 14 the side of liquid crystal layer 30 reflecting electrode 15.Additionally, reflecting electrode 15 turns into sub-pixel 50 part.Here, in the present embodiment, being located at the configuration space of the adjacent sub-pixel 50 of Y-direction, i.e. adjacent unit Pixel at intervals of P1.The configuration space of sub-pixel 50 be between the border of the side side of sub-pixel 50 1 adjacent in the Y direction away from From.Also, the distance between adjacent center of sub-pixel 50 is similarly P1.
In the first panel portion 10, the laminated circuit basal board 14a of first substrate 14 and planarization film 14b.Circuit substrate 14a quilts Be formed as making on the glass substrate many signal lines all (not shown) and multi-strip scanning line to intersect.Also, in many signal lines and The position that multi-strip scanning line is intersected, sub-pixel (being also only described as sometimes below " pixel ") 50 is two-dimensionally arranged into rectangular.
Also TFT (Thin Film Transistor are formed on circuit substrate 14a by each pixel 50：Thin film transistor (TFT)) Deng circuit elements such as switch element and volume elements.Planarization film 14b is formed on the circuit element of first substrate 14, holding wire With the surface of scan line, so as to realize the planarization on the surface in first panel portion 10.Also, press each above planarization film Pixel 50 forms reflecting electrode 15.Due to forming the circuit element containing TFT on first substrate 14, therefore also sometimes referred to as TFT substrate.Additionally, first substrate 14 has used the circuit substrate 14a for foring each unit on the glass substrate, but it is also possible to make Replace glass substrate with the substrate except glass material.Additionally, the substrate of circuit substrate 14a can also using shading material or The material of reflection.
Many signal lines are the distributions of the signal (display signal/signal of video signal) that pixel 50 is driven for transmitting, with respect to picture The matrix-shaped configurations of element 50, it is column direction (Fig. 2 to be formed by the setting of each pixel column, to the orientation of the pixel of the pixel column Y-direction) extend distribution structure.Multi-strip scanning line is the signal (scanning signal) for selecting pixel 50 by row unit for transmitting Distribution, the matrix-shaped configurations of generic pixel 50, formed by each pixel column set, to the pixel column pixel orientation The distribution structure that i.e. line direction (X-direction of Fig. 2) extends.X-direction is orthogonal with Y-direction.
Second panel portion 20 sets gradually by ITO (Indium Tin Oxide from the side of liquid crystal layer 30：Indium tin oxide) Transparency electrode 21, colored filter 22 Deng formation, the second substrate 23 using clear glass etc. as baseplate material, 1/4 wavelength Plate 24,1/2 wavelength plate 25 and Polarizer 26.Additionally, being set between the wavelength plate 24 of second substrate 23 and 1/4 in second panel portion 20 Put anisotropic scattering part (LCF) 27.
In the second panel portion 20, colored filter 22 is for example formed in the R of the striated of column direction (Y-direction) elongation Each optical filter of (red) G (green) B (blueness) is repeated with the pitch identical pitch of the line direction (X-direction) with pixel 50 The structure of arrangement.Second substrate 23 is due to configuration colored filter (CF) 22, therefore sometimes referred to as CF substrates.
The second panel portion 20 that is oppositely disposed by above-mentioned first panel portion 10 and the first panel portion 10 and matched somebody with somebody Put liquid crystal layer 30 between first panel portion 10 and second panel portion 20 and form liquid crystal display panel, second panel portion 20 it is upper Face (surface) turns into display surface.
On the reflecting type liquid crystal display panel 2 of said structure, pixel 50 has reflective display region by each pixel 50 Domain (reflective display portion).As described above, reflection display area has on the surface of the planarization film of first substrate 14 presses each picture The reflecting electrodes that element 50 is formed, using the reflectance-transmittance second panel portion 20 of reflecting electrode 15 from the exterior light of external incident, profit Shown with the reflected light.
[1-2. basic image element circuit]
The basic image element circuit of pixel 50 is illustrated following with Fig. 3 A.Direction (X side shown in X in figure 3 a To) line direction of reflective LCD device 1 shown in Fig. 2 is represented, direction (Y-direction) shown in Y represents column direction.
As shown in Figure 3A, many signal lines 61 (611、612、613...) and multi-strip scanning line 62 (621、622、 623...) by cross-over configuration, pixel 50 is configured in the cross part.Multi-strip scanning line 62 (621、622、623...) extend Direction is line direction (X-direction), many signal lines 61 (611、612、613...) extend direction be column direction (Y-direction).Such as Upper described, many signal lines 61 and multi-strip scanning line 62 are formed on the first substrate (TFT substrate) 14 in first panel portion 10 Surface.Also, holding wire 61 (611、612、613...) each one end and signal output apparatus 68 the output corresponding to each row End connection, multi-strip scanning line 62 (621、622、623...) output end corresponding to each row of each one end and scanning circuit 69 connects Connect.
Pixel 50 is for example formed with pixel transistor 51, liquid crystal capacitance 52 and the guarantor for having used thin film transistor (TFT) (TFT) Hold the structure of electric capacity 53.The gate electrode of pixel transistor 51 and scan line 62 (621、622、623...) connection, source electrode and letter Number line 61 (611、612、613...) connection.
Liquid crystal capacitance 52 means in pixel electrode and the comparative electrode that is formed corresponding thereto is (transparent equivalent to Fig. 2 Electrode 21) between the capacitive component of liquid crystal material that produces, pixel electrode is connected with the drain electrode of pixel transistor 51.Pixel electricity Pole in the case of colour display, equivalent to the reflecting electrode formed by each sub-pixel, it is monochromatic show in the case of equivalent to By the reflecting electrode that each pixel is formed.On the comparative electrode of liquid crystal capacitance 52, all pixels are by common additional DC voltage Common potential VCOM.Holding capacitor 53 is that the electrode of a side is connected by the pixel electrode with liquid crystal capacitance 52, the electrode of the opposing party It is connected by the comparative electrode with liquid crystal capacitance 52.
Many signal lines 61 (61 specify that by above-mentioned image element circuit1、612、613...) it is to picture by each pixel column The distribution of the signal of the transmission driving pixel 50 of element 50, the signal of video signal for being exported from signal output apparatus 70.Additionally, multi-strip scanning Line 62 (621、622、623...) it is with the signal of row unit selection pixel 50, i.e. from scanning circuit by the transmission of each pixel column The distribution of the scanning signal of 69 outputs.
[1-3. pixels and sub-pixel]
Reflective LCD device 1 in the case where colored display is supported, as shown in Figure 3 B, as forming coloured image A pixel of unit be colour element 5 for example comprising multiple sub-pixels (Sub-pixel) 50.Colour element 5 in this example The sub-pixel 50G of the sub-pixel 50R comprising display R, the sub-pixel 50B of display B and display G.The sub-pixel that colour element 5 has 50R, 50B and 50G by towards X-direction be towards reflective LCD device 1 line direction arrange.As described above, color images Element 5 can also again have the sub-pixel of a kind of color or multiple color.Reflective LCD device 1 is only supporting monochromatic display In the case of, it is that monochromatic pixel 5M forms the (phase of pixel 50 as a pixel of the unit for forming monochrome image as shown in Figure 3 C When the sub-pixel 50 in coloured image).Colour element 5 is the base unit for showing coloured image, and monochromatic pixel 5M is Base unit for showing monochrome image.
[electrode structure of 1-4. pixel portions]
Electrode structure with regard to pixel 50 is illustrated.
Fig. 4 is the figure of the electrode structure for pixels illustrated portion.Fig. 4 represents reflection (total reflection) formula liquid crystal display The top view of pixel portion.Shadow representation reflecting electrode 15 is used in fig. 4.
As shown in figure 4, the pixel portion of reflective LCD device forms such structure, pixel 50 is configured to matrix Shape, with respect to the configuration of the rectangular, holding wire 61 is configured in the locus between the pixel 50 extended along column direction, sweeps Retouch the locus that line 62 is configured between the pixel 50 extended along line direction.As described above, holding wire 61 and scan line 62 are configured on the first substrate 14 in first panel portion 10 by intersected with each other in fig. 2.
In the pixel portion (pixel array portion) of this spline structure, the reflective LCD device 1 shown in Fig. 4 be with pixel The almost identical size of 50 size forms the reflecting electrode 15 formed by metals such as aluminium, using the region of the reflecting electrode 15 as Reflection display area.That is, reflective LCD device 1 passes through to ensure that the reflection of size almost identical with the size of pixel 50 shows Show region, required reflective display performance can be obtained.
[type of drive of 1-5. liquid crystal display panels]
On liquid crystal display panel (liquid crystal display), in order to prevent due to constantly to the direct current of the additional same polarity of liquid crystal The deterioration of voltage, the resistivity (the intrinsic resistance of material) of liquid crystal etc., use makes with common potential as standard, with the cycle for specifying The type of drive of the polarity inversion of signal of video signal.
As the type of drive of such liquid crystal display panel, it is known that wired inversion driving mode, dot inversion type of drive With the type of drive such as frame inversion driving mode.Line inversion driving mode is that (H is in the 1H equivalent to a line (1 pixel column) During level) time cycle make the type of drive of the polarity inversion of picture signal.Dot inversion type of drive be by each each other Adjacent pixel up and down, the type of drive for inverting with making the alternating polarity of signal of video signal.Frame inversion driving mode be by The type of drive that the picture signal that will write whole pixels equivalent to every 1 frame of picture is inverted simultaneously with identical polarity.
If the type of drive that reflective LCD device 1 is inverted using frame, in a whole frame period, by identical polar Signal voltage write signal line, it is therefore possible to produce shade (シ ェ ー デ ィ Application グ) possibility.Therefore, in reflection type liquid On crystal device 1, when using frame inversion driving mode, the pixel with memory function is used as pixel 50, for example With can be by so-called MIP (memory pixel) mode of the memory of each pixel data storage.Using the situation of MIP modes Under, because pixel 50 is by the voltage of lasting Additional provisions, therefore shade can be reduced.
Additionally, MIP modes are by the memory with data storage in pixel, such that it is able to realize by simulative display The display of pattern and the display for passing through memory display mode.Simulative display pattern is the display mould of simulation ground display pixel gray scale Formula.Memory display mode is the binary message (logical one/logical zero) based on the memory being stored in pixel, numeral The display pattern of ground display pixel gray scale.
In the case of memory display mode, due to using the information being kept in memory, therefore without in frame week Phase performs the write activity of the signal potential for reflecting gray scale.Therefore, in the case of memory display mode, with must frame week The simulative display pattern that phase performs the write activity of the signal potential for reflecting gray scale is less compared to power consumption.In other words, may be used To reduce the power consumption of reflective LCD device 1.Additionally, a SRAM only example, it would however also be possible to employ use it He is memory such as DRAM (Dynamic Random Access Memory：Dynamic random access memory) structure.
In the present embodiment, when using MIP modes, it is possible to use area gray level method, time division gray level method etc..Such as Fruit use time splits gray level method, even rest image, time different pixels current potential is just different, the liquid in pixel and between pixel Brilliant molecule will be mobile.Therefore, compared with use time segmentation gray level method, area gray level method is preferably used.
Additionally, in above-mentioned example, having been used as the pixel with memory function has and can be deposited by each pixel The pixel of the MIP of the memory of data is stored up, but this is only an example.As the pixel with memory function, except MIP Beyond pixel, for example, the well-known pixel using memory liquid crystal can also be shown.
It is white displays that the display pattern of liquid crystal has when not applying electric field (voltage), is black display during applying electric field Normal white mode and do not apply during electric field to be black display, be the normally black mode of white displays during applying electric field.The two patterns The structure of liquid crystal cell is identical, and the configuration of the Polarizer 26 of Fig. 2 is different.The quilt of reflective LCD device 1 of present embodiment It is white displays when electric field (voltage) is not applied, is driven under the normal white mode for during applying electric field being black display.
[1-6. anisotropic scatterings part]
Fig. 5 is the sectional view of anisotropic scattering part.Fig. 6 is the signal of the function of illustrating anisotropic scattering part Figure.Fig. 7 is the schematic diagram of the function of illustrating anisotropic scattering part.Fig. 8 is the optics for representing reflective LCD device One schematic diagram of example of design.
Reflective LCD device 1 is configured in the direct of travel in the light reflected using reflecting electrode 15 and compares liquid The farther position of crystal layer 30, make the anisotropic scattering part 27 of the sheet of light scattering.More specifically, Reflective liquid crystal displays dress Put 1 has anisotropic scattering part 27 between the wavelength plate 24 of second substrate 23 and 1/4.Anisotropic scattering part 27 is to make The anisotropic layer of the light scattering of the reflection of reflecting electrode 15.Anisotropic scattering part 27 can for example use LCF (LightControl Film：Light control film).
Anisotropic scattering part 27 is to make the anisotropic scattering layer from the incident light scattering of specific direction.Anisotropy Scattering part 27 makes the incident light almost in the case where light comes from the specific direction of the side of Polarizer 26 to the incidence of second substrate 23 Pass through with not scattering, and the light returned after making to be reflected by reflecting electrode 15 is significantly scattered.
As shown in figure 5, anisotropic scattering part 27 includes refractive index two kinds of region (first area 27B different from each other With second area 27S).Anisotropic scattering part 27 can as illustrated in fig. 6 form the second area 27S of multiple tabulars to advise The fixed cell structure being spaced in the 27B of first area.In the present embodiment, first area 27B compares by refractive index Two region 27S low material is formed.That is, first area 27B by anisotropic scattering part 27 refractive index it is relatively low Material is formed, as region of low refractive index.Additionally, second area 27S by anisotropic scattering part 27 refractive index it is relative Material higher is formed, as high-refractive-index regions.Here, in the present embodiment, by second area adjacent in the Y direction The configuration space of 27S, the configuration space of i.e. adjacent high-refractive-index regions are set to P2.The configuration space of second area 27S is in Y The distance between adjacent center of second area 27S in direction.
Anisotropic scattering part 27 be, for example, first area 27B and second area 27S towards thickness direction extend and to The direction of regulation inclines.Anisotropic scattering part 27 be, for example, by from incline direction to refractive index different from each other two kinds with On the monomer of optical polymerism or the mixture of oligomer be on resin flake irradiation ultraviolet radiation and formed.On as the firstth area The material that domain 27B and second area 27S can be used will be explained below.Additionally, anisotropic scattering part 27 can also shape Into structure unlike those described above, it is also possible to the anisotropic scattering part manufactured with method unlike those described above.Anisotropy dissipates It can be one layer, or multilayer to penetrate part 27.Can be mutually the same if anisotropic scattering part 27 is multilayer Structure, or structure different from each other.
Anisotropic scattering part 27 makes this outer when the exterior light L1 of relative second substrate 23 is incident from the first prescribed direction Portion's light L1 scatterings, when exterior light L2 is incident from the second prescribed direction, pass through exterior light L2.Also, anisotropic scattering Part 27 passes through exterior light L2 when exterior light L2 is incident from the second prescribed direction, makes to be reflected in the light for being passed through The light of the reflection of electrode 15 is centered on scattering central axis in the scope scattering of regulation.Exterior light L2 is the polarisation to second substrate 23 The directional light of the incidence of plate 26.Exterior light L2 can be non-polarized light, or polarised light.Additionally, anisotropic scattering part 27 in light from exterior light L1, L2 opposition side incidence in the case of similarly make relative second substrate 23 from certain direction incidence Light scattering, make to be passed through from the incident light in other directions.Specifically, relative second substrate 23 from the 4th prescribed direction incidence is made Light L4 is scattered, and when light L3 is incident from the 3rd prescribed direction, passes through exterior light L3.Additionally, first and fourth direction be Direction inverts 180 degree, is identical direction.Second and third direction be direction reversion 180 degree, be identical direction.Additionally, Being scattered in for light is produced by the period of anisotropic scattering part 27, can be scattered in incidence, it is also possible to when projecting Scattering, it is also possible to scatter in the paths.
Anisotropic scattering part 27 is cell structure, as shown in fig. 6, the scattering light L1a shapes after scattering exterior light L1 Into first area 27B and second area 27S long side direction diameter d1 for short axle, in first area 27B and second area 27S Short side direction (orientation of first area 27B and second area 27S) diameter d2 for major axis elliptical shape.Additionally, each Anisotropy scattering part 27 similarly makes light scattering in the case where making from the light scattering of the reflection of reflecting electrode 15 with elliptical shape.
The scattering central axis of anisotropic scattering part 27 are for example preferably towards main view angular direction.Additionally, scattering central axis Can also be towards the direction different from main view angular direction.Whichever direction, as long as scattering central axis are set to using each During anisotropy scattering part 27, the brightness for making main view angular direction using the effect of anisotropic scattering part 27 is reflected for most bright Rate is highest.Main perspective is the user in reflective LCD device 1 in use reflective LCD device 1 When, it is corresponding with the orientation for seeing image display surface, in the case where image display surface turns into rectangular shape, the one of image display surface The direction orthogonal with a line nearest from user is corresponding in bar side.The reflective LCD device 1 of present embodiment The direction of main perspective is set in YZ planes.The direction of main perspective include the direction parallel with Z-direction, be preferably included in from Z-direction rotates 30 ° of direction to all directions.
The anisotropic scattering part 27 of present embodiment is cell structure, but is not limited to this.It is each to different shown in Fig. 7 Property scattering part 27 can also be that the second area 127Sa of cylindricality is arranged in the 127B of first area.Can also like this by Second area 127Sa forms column construction.Here, after the anisotropic scattering part 127 shown in Fig. 7 will scatter exterior light L Scattering light L1a form the circle that diameter d1a and diameter d2a are same diameters as illustrated in fig. 7.Additionally, anisotropic scattering Part 127 similarly makes light scattering in the case where making from the light scattering of the reflection of reflecting electrode 15 using circle.
Fig. 8 is a schematic diagram for example of the optical design for representing reflective LCD device.Fig. 8 represents liquid crystal list The direction of each axle of the structure member in first (liquid crystal layer 30) and second panel portion 20.Specifically, as shown in figure 8, with regard to the second face The side of plate portion 20, Polarizer 26 is represented respectively absorbs direction of principal axis, the slow phase direction of principal axis of anisotropic scattering part 27,1/2 wavelength The slow phase direction of principal axis of plate 25, the slow phase direction of principal axis of 1/4 wavelength plate 24 and the TFT substrate side of liquid crystal cells and rubbing for CF substrate-sides Wiping direction.
[light unit before 1-7.]
Following with Fig. 1 and Fig. 9 to Figure 12, preceding light unit 4 is illustrated.Fig. 9 is the outline structure for representing preceding light unit Into top view.Figure 10 is the amplification plan view of the schematic configuration for representing light guide plate.Figure 11 is the line A-A sectional view of Figure 10.Figure 12 is the explanatory diagram of the function of the preceding light unit of explanation.
As shown in figure 1, preceding light unit 4 is configured in the surface of second substrate 23, the surface of the second substrate 23 is to make The face of the display image side of reflecting type liquid crystal display panel 2, the i.e. face of incidence of external light, are the light reflected by reflecting electrode 15 The face of injection.Preceding light unit 4 has light source 40, light guide plate 44 and bonding part 46.
As shown in figure 9, light source 40 has multiple LED (Light Emitting Diode：Optical diode) 42.It is multiple LED42 is configured to column-shaped with respect to a side of light guide plate 44.Present embodiment has used multiple LED42 as light source 40, The other light sources such as fluorescent tube can also be used.
Light guide plate 44 is transparent plate-shaped member, is laminated in the table of the second substrate 23 of reflecting type liquid crystal display panel 2 Face (display surface).In the present embodiment, light guide plate 44 is the opposite side configuration light source of a side of end in the Y direction 40.Light guide plate 44 covers the surface of whole second substrate 23, in the relative surface 44a in the surface (display surface) with second substrate 23 It is upper to form multiple grooves 70.
As shown in Figures 9 to 11, groove 70 is elongated shape, and the elongated shape is parallel with the orientation of light source 40 Direction be the direction orthogonal with the direct of travel of the light exported from light source 40 i.e. X-direction is long side direction, with light source 40 The orthogonal direction of orientation, i.e., be short side direction from the direct of travel i.e. Y-direction of the light of the output of light source 40.The quilt of groove 70 It is adjacent in the Y direction.Although additionally, groove 70 can be formed in the whole region of the X-direction of surface 44a, such as Figure 10 It is shown, in the present embodiment, it is formed in a part of surface 44a.Additionally, light guide plate 44 configures multiple grooves in X-direction 70。
Interval (configuration space, pitch) P3 of the groove 70 adjacent in the Y direction of light guide plate 44 becomes according to the position of Y-direction Change.Here, the configuration space of groove 70 is the distance between adjacent center of groove 70.Additionally, as shown in Figure 10, if matched somebody with somebody respectively The unit comprising many bar grooves 70 is put, the interval of groove 70 is compared in unit.If additionally, light guide plate 44 is in the Y direction Or X-direction is separated and is more than 1mm, it is possible to as other units.Specifically, as shown in figure 9, light guide plate 44 in the Y direction closer to Light source 40 interval P3 it is bigger, from light source 40 more away from be spaced P3 it is narrower.The model of the prescribed limit in the Y direction of light guide plate 44 such as 1mm The average value of the interval P3 of the groove 70 for enclosing changes according to position, and each interval P3 brokenly changes.I.e., such as Shown in Fig. 9, light guide plate 44 is more sparse closer to the configuration density of light source 40 in the Y direction, from light source 40 more away from configuration density it is more intensive.
Additionally, the pitch P3 of the Y-direction of the groove 70 of light guide plate 44 is less than 100 μm.By the section for making the groove 70 of light guide plate 44 100 μm are less than or equal to away from P3.Both the striped of light guide plate pitch can have been made less obvious, light reflected, scattered again. Additionally, the pitch P3 of the Y-direction of the groove 70 of light guide plate 44 is preferably smaller than equal to 20 μm.By the Y side for making the groove 70 of light guide plate 44 To pitch P3 be less than or equal to 20 μm, can more suitably make light reflect, scattering.
Additionally, the groove 70 of light guide plate 44 can be formed using nano impression.Light guide plate 44 is formed by using nano impression Groove 70, can easily on the 44a of surface formed groove 70.Additionally, no for the forming method of the groove of light guide plate 44 special Limitation, can be formed by semiconductor etch processes, it is also possible to by be machined formed.
Bonding part 46 is configured between the surface 44a of light guide plate 44 and second substrate 23, makes light guide plate 44 and second Substrate 23 is bonded.Bonding part 46 is transparent adhesive.Bonding part 46 bonds the surface 44a and second substrate of light guide plate 44 23, it is formed in the state without air layer between the surface 44a of light guide plate 44 and second substrate 23.
As shown in figure 12, each LED42 output light of preceding light unit 4 from light source 40.The light for being exported is from light guide plate 44 End face is incident to the inside of light guide plate 44.The light that light guide plate 44 will incide inside is guided to Y-direction.When in entrance light guide plate 44 Light reach surface 44a opposition side when, if incidence angle regulation angle below if reflected.Also, once enter and lead Light in tabula rasa 44 reaches surface 44a, concavo-convex reflection, the scattering for just being formed by groove 70, towards reflecting type liquid crystal display panel 2 Project.Preceding light unit 4 forms groove 70 in the surface 44a of light guide plate 44 like this, makes light reflection, scattering from the incidence of light source 40, So that light is projected towards reflecting type liquid crystal display panel 2.So, even if the preceding light unit 4 that light will be made incident is configured in reflection The display surface side of formula liquid crystal display panel 2, it is also possible to make light incident to reflecting type liquid crystal display panel 2.
Here, the light projected towards reflecting type liquid crystal display panel 2 passes through reflecting type liquid crystal display panel 2, in reflection After electrode 15 is by reflection, the eyes of observer are reached through light guide plate 44.Additionally, as described above, aobvious towards reflection type liquid crystal Show the light of the injection of panel 2 according to the mesomorphic state through the position of reflecting type liquid crystal display panel 2, be blocked the part do not projected It is switched with the part projected, so that image is shown on the display face.
[function of 1-8. reflective LCD devices]
Reflective LCD device 1 has above-mentioned structure.Reflective LCD device 1 is on the surface of light guide plate 44 44a forms the groove of the pitch of multiple Y-directions less than or equal to 100 μm, makes light in light guide plate 44 towards Reflective liquid crystal displays face Plate 2 is projected, and the light such that it is able to make the distribution that have adjusted light using precision higher enters towards reflecting type liquid crystal display panel 2 Penetrate.Additionally, reflective LCD device 1 makes narrow width of the groove 70 in the inclined direction of view directions (YZ planes), with Width on the orthogonal direction in the inclined direction in main view angular direction (YX planes) is long, such that it is able to suitably make from light source output Light scattering.
Additionally, reflective LCD device 1 on reflecting type liquid crystal display panel 2 by setting anisotropic scattering portion Part, such that it is able to make more light to main view angular direction export, and can expand the inclined direction of view directions (YZ put down Face) on visual angle, the visual angle that can be reduced on the direction (YX plane) orthogonal with the inclined direction in main view angular direction.Additionally, The anisotropic scattering part high by setting diffusivity, can spread light, can suppress to produce Moire fringe.
Interval (pitch) P1 of the unit pixel of reflective LCD device 1 rolls over the high of anisotropic scattering part 27 The average P2a for penetrating interval (the pitch, configuration space) P2 in rate region forms the relation of P2a ＜ P1.By so making average P2a small In interval P1, can make to have passed through the light scattering of unit pixel.Such that it is able to suppress to produce Moire fringe.
Reflective LCD device 1 is formed on planarization film 14b by by the reflecting electrode 15 of first substrate 14, from And can suppress to form concavo-convex in reflecting electrode 15.Can so suppress to cause generation More's bar due to the reflection of reflecting electrode 15 Line.
Reflective LCD device 1 preferably makes interval (pitch, configuration space) P1 of unit pixel more than between groove 70 Every the average P3a of (pitch, configuration space) P3.Form P1 ＞ P3a.Dissipated by can so make the light that have passed through unit pixel Penetrate, can suppress to produce Moire fringe.
Reflective LCD device 1 as unit pixel interval (pitch, configuration space) P1, anisotropic scattering portion The average P2a of interval (pitch, configuration space) P2 of the high-refractive-index regions of part 27 and the interval of groove 70 are (between pitch, configuration Every) relation of the average P3a of P3 show make pixel interval P1 be 20 μm, the average P2a at the interval of high-refractive-index regions be 3 μm, the average P3a at the interval of groove 70 be 6 μm.
Reflective LCD device 1 preferably makes the configuration density of the groove 70 of light guide plate 44 from light as shown in the embodiment Source 44 is more near more sparse.By the way that the light from the injection of light source 40 so, can be made more uniformly towards reflecting type liquid crystal display panel 2 It is incident.
Reflective LCD device 1 is preferably irregularly arranged the groove 70 of light guide plate 44.By so can be with higher Probability suppress produce Moire fringe.
Additionally, the light guide plate 44 of reflective LCD device 1 is preferably aobvious towards reflection type liquid crystal according to following distribution Show that panel 2 projects light, the distribution is that the brightness of light towards the light in the direction of main view angular direction of reflecting electrode reflection is higher than it The brightness in his direction.Furthermore, it is possible to using the configuration or Adjusting Shape of the groove 70 of light guide plate 44 towards Reflective liquid crystal displays face The distribution of the light of the output of plate 2.
The electronic equipment ＞ of ＜ 2.
The reflective LCD device of present invention mentioned above can be believed as the video that will be transfused to electronic equipment Number or the electronic equipment of every field that is shown as image or image of the signal of video signal that is generated in electronic equipment it is aobvious Show that portion's (display) uses.
Reflective LCD device of the invention is in the electronic equipment of every field preferably as out of doors using frequently The display part (display) of rate mobile terminal device high is used.The mobile terminal device that can be shown for example have digital camera, Mobile information apparatus or the movements such as video camera, PDA (personal digital assistant), game machine, subnotebook PC, e-book Mobile communication equipment of phone etc. etc..
As can be seen that reflective LCD device of the invention can keep from the explanation of above-mentioned implementation method Shown with transmission is carried out on the basis of reflective LCD device identical reflective display performance, therefore can ideally played The feature of reflective LCD device is power saving, the under a bright ambient environment also characteristic of easily visible picture.Therefore, each neck The electronic equipment in domain, wherein using reflective LCD device of the invention as its display part in mobile terminal device, Such that it is able to be remarkably contributing to the low power consumption of mobile terminal device.
Just reflective LCD device of the invention is used as display part electronic equipment below is i.e. of the invention The specific example of electronic equipment is illustrated.
Figure 13 A are represented using the outward appearance of digital camera of the invention, are the stereograms from terms of face side, and Figure 13 B are from the back of the body The stereogram that surface side is seen.Illuminating part 111 of the digital camera of the application example including flash lamp, display part 112, menu switch 113rd, shutter release button 114 etc., the display part 112 is manufactured by application reflective LCD device of the invention.
Figure 14 is to represent the stereogram using the outward appearance of video camera of the invention.The video camera of the application example includes body 131st, towards the lens 132 on side above for subject, shoot when beginning/shutdown switch 133, display part 134 etc., the display part 134 is manufactured by using reflective LCD device of the invention.
Figure 15 is to represent the stereogram using the outward appearance of subnotebook PC of the invention.The notebook of the application example Type PC includes keyboard 122 and the display part 123 of display image operated when being input into word etc. etc. in body 121, passes through The display part 123 is manufactured using reflective LCD device of the invention.
Figure 16 A to Figure 16 G are represented using the outside drawing of mobile communication equipment of the invention such as mobile phone.Figure 16 A It is the front view under open mode, Figure 16 B are its side views, and Figure 16 C are the front views of closed mode, and Figure 16 D are left views, figure The right view that 16E is, Figure 16 F are top views, and Figure 16 G are look up figure.
The mobile phone of the application example includes upside casing 151, downside casing 142, connecting portion (being here hinge part) 143rd, display screen 144, sub- display screen 145, flash lamp 146, camera 147 etc..Also, as display screen 144 and sub- display screen 145 manufacture the mobile phone related to the application example using reflected displaying device of the invention.
Figure 17 is represented using the front view of other mobile electronic devices of the invention.The mobile electronic device of the application example Be as portable computer, multifunctional portable telephone machine, can voice call portable computer or the portable electric that can communicate Brain works, also referred to as so-called smart mobile phone, the information mobile terminal of flat board (tablet) terminal.Information mobile terminal example Such as there is display part 162 on the surface of casing 161.The display part 162 is the reflective LCD device 1 of present embodiment. Additionally, also installing detection close to the so-called touch-screen of the object of liquid crystal display panel in display part 162.
The structure ＞ of the invention of ＜ 3.
The present invention can use following structure.
(1) a kind of reflective LCD device, possesses liquid crystal panel and preceding light unit, and the liquid crystal panel has：Instead Radio pole, the reflecting electrode is set by each unit pixel；First substrate, the first substrate is provided with above-mentioned reflection electricity Pole；Transparency electrode, the transparency electrode is relative with above-mentioned reflecting electrode；Second substrate, the second substrate is provided with above-mentioned Prescribed electrode；Liquid crystal layer, the liquid crystal layer is arranged between above-mentioned first substrate and above-mentioned second substrate；And sheet it is each to Different in nature scattering part, the anisotropic scattering part is laminated on above-mentioned second substrate, mixed configuration low-index regions Domain and the refractive index high-refractive-index regions higher than above-mentioned region of low refractive index, preceding light unit have：Light guide plate, the light guide plate It is laminated on the face of above-mentioned second substrate side of above-mentioned liquid crystal panel, is formd on the face relative with above-mentioned liquid crystal panel many Groove of the individual pitch less than or equal to 100 μm；And light source, the light source makes light incident to above-mentioned light guide plate, wherein, above-mentioned unit picture Average configuration space of the configuration space of element more than the high-refractive-index regions of above-mentioned anisotropic scattering part.
(2) reflective LCD device according to above-mentioned (1), wherein, the above-mentioned reflection electricity of above-mentioned first substrate Pole is formed on planarization film.
(3) reflective LCD device according to above-mentioned (1) or above-mentioned (2), wherein, above-mentioned unit pixel is matched somebody with somebody Put average configuration space of the interval more than the above-mentioned groove on above-mentioned light guide plate.
(4) reflective LCD device according to any one of above-mentioned (1) to above-mentioned (3), wherein, above-mentioned leaded light The configuration density of the above-mentioned groove on plate is more sparse closer to above-mentioned light source.
(5) reflective LCD device according to any one of above-mentioned (1) to above-mentioned (4), wherein, above-mentioned leaded light Above-mentioned groove on plate is irregularly arranged.
(6) reflective LCD device according to any one of above-mentioned (1) to above-mentioned (5), wherein, above-mentioned leaded light Above-mentioned groove on plate is formed by the direction for turning into long side direction with the direction parallel with the aspectant side of above-mentioned light source, adjacent Ground configuration is in the direction orthogonal with the aspectant side of above-mentioned light source.
(7) a kind of electronic equipment, with the reflective LCD device any one of above-mentioned (1) to above-mentioned (6).
Below just it is described with, but the present invention is not limited by the above.Also, the above-mentioned present invention Inscape include those skilled in the art easily envision inscape, substantially the same inscape, institute The inscape of the equivalents of meaning.Furthermore, it is possible to be combined as above-mentioned inscape.Additionally, not departing from ancestor of the present invention In the range of purport, above-mentioned inscape can carry out various omissions, replacement and change.
Symbol description
1st, reflective LCD device 2, reflecting type liquid crystal display panel
4th, preceding light unit 15, reflecting electrode
21st, transparency electrode 22, colored filter
27th, anisotropic scattering part 27B, 127B, first area
27S, 127Sa, second area 30, liquid crystal layer
40th, light source 42, LED
44th, light guide plate 44a, surface
46th, bonding part 50,50R, 50G, 50B, sub-pixel (pixel)
51st, pixel diode 70, groove.

Claims (7)

1. a kind of reflective LCD device, it is characterised in that possess liquid crystal panel and preceding light unit,
The liquid crystal panel has：Reflecting electrode, the reflecting electrode is set by per unit pixel；First substrate, it is described First substrate is provided with the reflecting electrode；Transparency electrode, the transparency electrode is relative with the reflecting electrode；Second substrate, The second substrate is provided with the transparency electrode；Liquid crystal layer, the liquid crystal layer is arranged on the first substrate with described second Between substrate；And the anisotropic scattering part of sheet, the anisotropic scattering stacking part on the second substrate, Region of low refractive index and the refractive index high-refractive-index regions higher than the region of low refractive index are configured with,
The preceding light unit has：Light guide plate, the light guide plate is layered in the face of the second substrate side of the liquid crystal panel On, and groove of multiple pitches less than or equal to 100 μm is formed with the face relative with the liquid crystal panel；And light source, institute Stating light source makes light incident to the light guide plate,
Between average configuration of the configuration space of the unit pixel more than the high-refractive-index regions of the anisotropic scattering part Every.
2. reflective LCD device according to claim 1, it is characterised in that the reflection of the first substrate Electrode is formed on planarization film.
3. reflective LCD device according to claim 1, it is characterised in that the configuration space of the unit pixel More than the average configuration space of the groove on the light guide plate.
4. reflective LCD device according to claim 1, it is characterised in that the groove of the light guide plate is matched somebody with somebody Put density more sparse closer to the light source.
5. reflective LCD device according to claim 1, it is characterised in that the groove of the light guide plate is not advised Then configure.
6. reflective LCD device according to claim 1, it is characterised in that the groove of the light guide plate with The direction parallel with the aspectant side of the light source turn into long side direction direction formed, and be adjacent to configuration with it is described On the orthogonal direction in the aspectant side of light source.
7. a kind of electronic equipment, possesses the reflective LCD device described in claim 1.
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